class aerotest
	{
		public static void main (String[] felight)
		{
			Flyable Aero = new aplane();
			Aero.start();
			Aero.fly();
			Aero.land();
			Flyable Jt = new Jet();
			Jt.start();
			Jt.fly();
			Jt.land();
			Flyable Heli = new Helicopter();
			Heli.start();
			Heli.fly();
			Heli.land();
		}
}